Great Diamond Island Marine Forecast
Maine · 43.670°, -70.200° · National Weather Service
Next 24 hours
7-Day Marine Outlook
Wind, temperature, and conditions for Great Diamond Island.
About the marine forecast for Great Diamond Island
This is the National Weather Service forecast for Great Diamond Island (Maine), covering wind, wave height, temperature, and conditions over the coming week. Wind and seas are what make or break a day on the water, so start there. Remember that gusts, not the average, are what knock you around, and that wind blowing against the tide stacks the seas up steeper than the numbers suggest. Wave height here is the significant wave height, so some individual waves come through taller.
Planning a trip out of Great Diamond Island? Pair this with the Great Diamond Island tide chart so you've got the water and the weather in one look.
Frequently asked
What is the wind forecast for Great Diamond Island today?+
Today at Great Diamond Island, expect wind from the S at 10 to 15 mph, with patchy fog then chance showers and thunderstorms. See the hourly breakdown above for how it changes through the day.
Where does this Great Diamond Island marine forecast come from?+
It's the official National Weather Service point forecast for Great Diamond Island's coordinates, covering wind, temperature, and conditions for the next 7 days. It's the same data marine forecasts are built on.
Is it a good day to go boating at Great Diamond Island?+
Check the wind first — it's what makes or breaks a day on the water — then the conditions and any advisories. Match the forecast to your boat and experience, tell someone your plan, and always leave yourself a way back.
See the wind on your chart
Pathr paints live wind, waves, and radar right on the Great Diamond Island chart, and routes you around the shallows. Free to try for two months on iOS.